Window lock and alarm



April 16, 1940; F. MR

WINDOW LOCK AND ALARM 2 Sheets-Sheet 1 Filed June 2, 1939 1 It 7'92 April 16, 1940. F. PIPER W INDOW LOCK AND ALARM Filed June 2, 1959 2 Sheets-Sheet 2 Patented Apr. 16, 1940 UNITED. s Ares PATENT, OFF-ice H 2,197,080 wmnow LOCK AND ALARM Frederick Piper, Portland, Oreg.

Application June 2, 1939, Serial No. 277,100

' 2 Claims.

This invention relates to a. combined window.

lock and alarm, the invention being an improvement of that disclosed in an application flled by me on September 11, 1937, Serial No. 163,475, now Patent Number 13, '1938.

The object of. this invention is to improve v-and simplify the previous construction and to make the devicec'apable of being manufactured tosell at a lower cost.

The invention also consists in certainfother features of construction, combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claims.

In describing the inventionin detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which: k

Fig. 1 is a longitudinal sectional view through a portion of a window use thereon.

Fig. 2 is a front view the device.

showing the invention in Fig. 3 is a view looking into the housing from In these views, the numeral I indicates an.

elongated channel member having its flanges turned inwardly, "as at l' and one flange has 1 the row of spaced slots 2 therein. This memher is attached to' oneside railof the upper sash A, as shown in Fig. 1 A housing 3 has the side flanges 4 which slide in the member I and the flanges 4 extend well beyond the top of the housing, as shown at 4", and the extended part of one flange has a projection 4' thereon for engaging the slots 2. These parts of the flanges are slightly resilient so that by pressing them towards each other the projection 4' can be moved out 01' one slot 2 and then the housing is moved in the member I until the projection is opposite another slot. Then by releasing the parts 4 they will spring outwardly and push the projection into said other slot. Thus the housing can be adjusted towards and from the 2,139,848, dated December of thehousing part of lower sash B and when the projection is engaging a slot, the housing is prevented from moving upwardly but due to the rounded lower end of the projection -4 the, housing can be moved downwardly without pressing the flanges 4" to-. 1

wards each other. v

The housing is formed with an enlarged upper part but the lower part forms a wedge 5 which willbe engaged by the lower sash, if an attempt is made to raise the lower sash with the device in place, and thus the housing will stop upward movement of the lower sash and downward move ment of the upper sash. Of courseby adjusting the housing upwardly in the member I, the sashes can be partly opened for ventilating purposes but then the device will act to prevent further opening movement of the sashes.

A shaft 6 is journaled in the large part of th housing and has a handle 1 fastened to its outer end, so that the shaft can be turned to wind the spring 8, which has one end connected with the shaft and its other end to a part of the housing}! as shown at 9. A ratchet wheel i0 is connected with the shaft and an escapement pawl H is pivoted in the housing and engages this wheel. A hammer member I2 is fastened to the lower end of the pawl and will strike a part of the housing when the pawl is-being oscillated by the turning of the wheel by the spring. This. will make a noise to act as an alarm tonotify the occupants of the house that an attempt is being mad-e to'enter through the'window; In order to hold the parts stationary until an attempt is made to open the window, a plate-like member I I3 is provided. This member extends along the inner side of the housing and has a slot M'there- .in through which passes the pivot pin l5 of pawl l I and a slot l6 through which extends the shaft 6.- The .upper portion of the,member I3 is enlarged, as shown in Fig. 4 and this part has aprojection l1 thereon for engaging the ratchet wheel ID to prevent movement of the same.

This projection is held in engagement with the wheel by a spring l8 which has one end connected with the lower part of the housing and its other end with the member I3. Said member l3 has a reduced lower part which is provided with a flange l9 and this lower part extends through a slot 20 in the lower part of the enlarged portion of the housing. The lower end sash if either sash is moved towards the other 50 of the flanged part will be engaged by thelower and when this happens the member 13 will be 8 moved upwardly against the action of the spring It. This will free the wheel from the projection l I and permit the spring to rotate the wheel and as the wheel rotates it will oscillate the pawl II to cause the hammer l2 to strike parts of the housing to sound an alarm and the pawl will also act to prevent the wheel from rotating too fast.

If it is not desired touse the adjusting means, the housing is entirely removed from the guide member I, or if it is only desired to open the sash a small amount, the housing can be moved to the upper part of the member. However. when it is desired to adjust the opening movement of the sashes, the housing is put in the guide member. If the sashes are to be held in entirely closed position, the housing is positioned in the member with its lower end adjacent the upper end of the lower sash but if the sashes are to be held in partlyopen position, then the housing is adjusted in the guide member with its lower end spaced from the upper end of the lower sash. In either case, if an attempt is made to open either sash the upper end of the lower sash will engage the lower end of the member I3, thus moving it upwardly so-as to cause the projection H to free the ratchet wheel so that the spring will start to rotate the wheel and this movement of the wheel will cause the pawl II to oscillate and the hammer I2 to strike parts of the housing and thus give an alarm. After the sash has been moved slightly, the small lower'end of the housing will engage the upper end of the lower sash and thus prevent further opening movement of either sash.

It is thought from,the foregoing description moved..

that the advantages and novel features ofv the, invention will be readily apparent.

It is to be understood that changes may be madein the construction, combination and arrangement of the several parts, provided such changes fall within the scope of the appended claims.

What I claim and desire to protect by Letters Patent is:

1. A sash lock of the class described, comprising a channel member adapted to be fastened to the side of a top sash and having slots in one flange thereof, a housing slidably arranged in the member and having -a resilient side part provided with a projection for engaging a slot, to hold the housing in adjusted position in said member, the lower end of the housing being of part extending above itstopQsaid resilient side a projection adapted part being provided with to engage a slot in the channel member to retain the housing in adjusted position in said channel member, and means carried by the housing for sounding an alarm when one of the sashes is FREDERI/CK PIPER. 

